General Description

The VHCT374A is an advanced high speed CMOS octal flip-flop with 3-STATE output fabricated with silicon gate CMOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintain ing the CMOS low power dissipation. This 8-bit D-type flip

flop is controlled by a clock input (CP) and an output enable input (OE). When the OEinput is HIGH, the eight outputs are in a high impedance state. Protection circuits ensure that 0V to 7V can be applied to the input and output (Note 1) pins without regard to the supply voltage. This device can be used to interface 3V to 5V systems and two supply systems such as battery backup. This circuit prevents device destruction due to mismatched supply and input voltages.

Features

■ High speed: fMAX =140 MHz (typ) at TA =25°C

■ High noise immunity: VIH =2.0V, VIL =0.8V

■ Power down protection is provided on all inputs and outputs

■ Low power dissipation: ICC =4 µA (max) @ TA =25°C

■ Pin and function compatible with 74HCT374